Windows Vista SP1 standalone installers are now available for download from the Microsoft Download Center: the five-language x86 (32-bit) version is available here; the five-language x64 (64-bit) version is available here.
Help File Updates
US-based Vista SP1 users who are installing the standalone packs listed above and don't have always on Internet connections will also want to download updated help files on key topics (updated help is not available in the standalone installers).Get the 32-bit x86 version. Get the 64-bit (x64) version. Non-US customers should check the Microsoft download center for localized versions of these files.
Fix Install Problems with CheckSUR
Installation problems with current and future Vista updates can be solved with CheckSUR. Read KB947821 for details. Download it: 32-bit x86 version; 64-bit x64 version.
Still have questions about Vista SP1? See our comprehensive coverage. And, before you install, be sure to check your system readiness with our checklists for Vista RTM and Windows XP users.